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Vaccines-2013 - OMICS Group

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Yurong Tan et al., J <strong>Vaccines</strong> Vaccin <strong>2013</strong>, 4:5http://dx.doi.org/10.4172/2157-7560.S1.0173 rd International Conference on<strong>Vaccines</strong> & VaccinationJuly 29-31, <strong>2013</strong> Embassy Suites Las Vegas, NV, USAAn inactivated Pseudomonas aeruginosa vaccine restores imbalanced airway immunityYurong Tan, LiLi wang, Dan Peng, Huihui Yang and Xiaoqun QinCentral South University, ChinaObjectives: Previously, we observed that an inactivated Pseudomonas aeruginosa vaccine (PPA) which was obtained bytransfection with the adhesion portion of type 1 fimbria of avian pathogenic E. coli inhibited airway allergic inflammationby bronchial administration in an OVA-induced airway hyperresponsiveness animal model. To investigate the underlyingmechanism involved, we studied the effects of PPA on epithelial functions in present studies by OVA stress or RSV infection.Methods: Flow cytometry was used to observe the effects of PPA on cell proliferation of BECs and BECs-drived subsets’differentiation of CD4+T cells. Real-time PCR was used to test the expressions of toll like receptor 4 and 5, two recognizedasthmatic therapeutic targets IL-17A/Th2 signal molecules Act1 and NF-kB negative regulator A20 in BECs.Results: PPA can promote cell proliferation and toll like receptor-4 and 5 expressions of normal, OVA-stressed and RSV-infectedBECs. PPA inhibited Th2 and Th17 differentiation and stimulated Th1 differentiation induced by OVA or RSV. PPA significantlydecreased Act1 expression induced by OVA and increased Act1 expression in BECs inhibited by RSV infection. PPA significantlyincreased A20 expression in BECs inhibited by OVA or RSV.Conclusions: Our data suggest that the therapeutic mechanism of PPA is partly to promote bronchial proliferation and shiftbronchial immunity from a Th2 and Th17 to a Th1 bias.Keywords: Pseudomonas aeruginosa, toll like receptors, RSV, CD4+T cells.hope7@126.comJ <strong>Vaccines</strong> Vaccin <strong>2013</strong>ISSN: 2157-7560, JVV an open access journal<strong>Vaccines</strong>-<strong>2013</strong>July 29-31, <strong>2013</strong>Volume 4 Issue 5Page 105

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